Door-spring.



0. W. ANDERSON.

DOOR SPRING.

APPLICATION FILED APR. 3. 1916.

1,1 90., Patented July 11, 1916.

van/729E 0. W40 ensan mow/5 ATZOAENEKS ens an F1.

OLE W. ANDERSON, OF BOYD, MINNESOTA.

DOOR-SPRING.

Application filed April 3, 1916.

1 0 all whom it may concern Be it known that I, OLE W. ANDERSON, a citizen of the United States, residing at Boyd, in the county of Lao qui Parle and State of Minnesota, have invented certain new and useful Improvements in Door- Springs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in door springs, especially adapted for use in connection with screen and storm doors; and, to this end, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters in dicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a fragmentary view in front elevation, showing a door casing and a screen door to which the invention is applied; and Fig. 2 is a view principally in horizontal section taken on the line 00 00 of Fig. 1, some parts being shown in different positions by means of broken lines.

The numeral 1 indicates a door casing and the numeral 2 indicates a screen door having a central rail 8 and connected to the door casing 1 by hinges 4:, only the central one of which is shown. An anchor plate 5 overlaps the fixed leaf of the hinge 4 and is rigidly secured to the door casing 1 by a pair of wood screws 6. Projecting laterally outward from and formed on the an chor plate 5, is a long vertical sleeve .7, a bearing lug 8 and a stop finger 9 horizontally spaced one from the other. The sleeve 7 is located close to the pintle of the hinge 41 and has mounted therein a headed pin 10. The stop finger 9 is located at the opposite edge of the anchor plate 5 from the sleeve 7 and the bearing lug 8 is located substantially half way between the sleeve 7 and the stop finger 9.

One end of a curved lever 11 is pivoted to the bearing lug 8 for horizontal swinging movement and the other end thereof is bifurcated and has journaled in the prongs thereof an anti-friction roller 12. This roller 12 is mounted to travel in a roller guide 13 secured by wood screws to the in- Specification of Letters Patent.

Patented July 11, 1916..

Serial No. 88,520.

termediate portion of the rail 3 of the door 2. As shown, the roller guide 13 is channelshape in cross section. A pair of coiled springs 14 are anchored, at one of their ends, to opposite sides of the lever 11 at the intermediate portion thereof, by means of a dog 15. From the dog 15, the coiled springs 14. diverge and their other ends are anchored, one to each end of the headed pin 10. By thus arranging the springs 14-, the free end of the lever 11 is held against lateral movement. The springs 14: draw the roller 12 onto the roller guide 13 and yieldingly hold the door closed.

The dog 15 is slidably mounted on the lever 11 and has formed in the body thereof a longitudinally extended slot 16 through which said lever projects. The outer end of the dog 15 is bifurcated and the prongs thereof are bent to form hooks 17, located one on each side of the lever 11 and to each of which is anchored one of the springs 14. Integrally formed with the dog 15, between the prongs thereof, is a lock tooth 1S arranged to interlock with ratchet teeth 19. These ratchet teeth 19 are cut in the outer longitudinal edge of the lever 11 and hold the lock dog 15in different longitudinal adjustments thereon when moved toward the anchor plate 5, under the tension of the springs 14, the inner end of the dog 15 being bent laterally to form a stop 20, which engages the adjacent edge of the lever 11. Ohviously, this stop 20 limits the rocking movement of the dog 15 to carry its lock tooth 18 into and out of engagement with the ratchet teeth 19. By adjusting the dog 15 on the lever 11, the tension of the springs 161 may be varied, at will.

The opening movement of the door 2 is limited by the engagement of the lever 11 with the stop finger 9, as shown by broken lines in Fig. 2. It will be noted that the stop finger 9 prevents the movement of the springs l l past a dead center, in respect to the pivot for the lever 11, thus rendering the said spring always operative to close the door.

In substituting a storm door for a screen door, it is not necessary to remove the improved door spring from position, but to simply provide the screen door with a duplicate roller guide 13.

The above described device, while extremely simple and of comparatively small cost to manufacture, has, in actual usage,

proven highly efficient for the purpose had in view. e

What I claim is V 1. The combination with a and a door hinged thereto, anchored to the door casing, a lever pivoted to the base plate at one end and having its other end bearing against the door, a clock dog mounted on the lever for sliding and rocking movements with respect thereto, and a spring anchored at one end to the base plate and at its other end to the lookdog, said spring tending to move the lever in a position to close the door and to hold the lock dog rocked into interlocking engagement with the lever. V

2. The combination with a door casing and a door hinged thereto, of a base plate anchored to the door casing, a lever pivoted to the base plate at one end and having of a base plate door casing its other end bearing against the door, 1ongitudinally spaced ratchet teeth on the lever, a lock dog having a body member with a slot through which the lever projects, said lock dog having sliding and rocking interlocking engagement with the ratchet teeth of the lever, and a spring anchored at one end to the base plate and at the other end to the lock dog, said spring tending to move the lever in a position to close the door and to hold the lock dog rocked into interlocking engagement with the ratchet teeth on the lever.

In testimony whereof I affix my signature in presence of two witnesses.

OLE W. ANDERSON.

Witnesses:

E. P. JOHNSON, P. C.,AGRE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

